About

Mattermost is an open-source, self-hostable online chat service designed for internal communication within organizations and companies, offering features such as file sharing, search, and third-party application integrations. Positioned as an open-source alternative to competitors like Slack and Microsoft Teams, its product portfolio includes a core service and an Enterprise Edition that provides advanced capabilities like single sign-on (SSO), multifactor authentication (MFA), advanced permissions, performance monitoring, compliance reporting, custom branding, and enterprise search. The company operates on a Free and Subscription pricing model, making both a free trial and a free version available to users, who have collectively given it a strong rating of 4.6 out of 5 based on 168 reviews.